48 MINERALS OF TASMANIA. 
152. MINIUM (Red Owide of Lead). 
Occurs as a pulverulent coating on other Lead minerals and 
lode-matter. The colour is an unmistakable bright red, with a 
feeble lustre. 
Whyte River Silver-lead mine. 
At the Adelaide Proprietary, Dundas, the Cerussite crystals 
are occasionally pitted with a dull black lead oxide which may be 
this species discoloured with powdery Manganese, or it may 
prove to be its more rare congener the binoxide (Plattnerite). 
The minute quantity noticed prevents a careful examination. 
1538. MARMOLITE (Foliated Serpentine). 
Our Serpentines vary to a considerable extent both in colour 
and structure, and they include the major portion of the described 
variations. 
Bonanza mine, Dundas (Montgomery). 
154. MERCURY, NATIVE. 
As minute globules distributed throughout a siliceous slate- 
rock which is coloured by organic matter. Native Gold-amalgam 
or “ White Gold” of the prospectors is reported to occur with it, 
but this statement requires confirmation. 
A short distance north of the Linda River, near Mount Lyell. 
(Alfred J. Taylor.) 
155. MELANOCHROITE (Chromate of Lead). 
This form of Lead Chromate mainly differs from Crocoisite in 
its darker colour and brick-red streak. 
Judging from the small quantity obtained it appears to be of 
rare occurrence : that examined was found in some specimens of 
ferro-manganese gossan from the Adelaide Proprietary mine at 
Dundas. It occurred in small amorphous patches mixed with 
larger masses of its congener and flakes of Galena. 
Hitherto its only recorded locality has been the Silver-lead mines 
of the Ural, Siberia, so that its detection here is of interest to 
mineralogists. 
156. MILLERITE (Sulphide of Nickel). 
Occurs in delicate capillary filaments of various shades of 
yellow, sometimes with an iridescent tarnish. The pure mineral 
contains 64°), of metallic Nickel. The occurrence of several 
species of nickelliferous minerals in the north-western portion of 
the island is of some interest, and tends to the supposition that 
this metal may be discovered in payable quantity when a thorough 
search is made for it. It is almost needless to say that it is of 
great economic value. Mr. G. Thureau, F.G.S. (Report on the 
future Prospects as regards Production and Permanency of the 
Beaconsfield and Salisbury Mining Districts, 1883), states that, 
